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Swift-XRT spectra of GRB 091102

Last updated after receiving ObsID 00374598001, version 16.

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Time-averaged spectrum (T0 + 988 to 87901 s)

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PC mode spectrum of GRB 091102

PC mode. Mean photon arrival: T0+6865 s

NH (Galactic)1.1 × 1021 cm-2
NH (intrinsic)4.6 (+6.9, -4.3) × 1021 cm-2
z of absorber0
Photon index3.4 (+1.9, -1.4)
Flux (0.3-10 keV)
(Observed)
1.86 (+1.70, -0.69) × 10-13 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.44 (+1.62, -0.67) × 10-12 erg cm-2 s-1
Counts to flux (obs)2.6 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)2.0 × 10-10 erg cm-2 ct-1
C-stat (dof)43.95 (43)
Exposure time7.6 ks

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Late Time spectrum (T0 + 6901 to 87901 s)

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PC mode spectrum of GRB 091102

PC mode. Mean photon arrival: T0+19078 s

NH (Galactic)1.1 × 1021 cm-2
NH (intrinsic)4.2 (+5.0, -4.2) × 1021 cm-2
z of absorber0
Photon index5.1 (+3.9, -2.3)
Flux (0.3-10 keV)
(Observed)
3.1 (+2.7, -1.7) × 10-14 erg cm-2 s-1
Flux (0.3-10 keV)
(Unabsorbed)
1.41 (1.00 × 1012, -0.81) × 10-12 erg cm-2 s-1
Counts to flux (obs)1.8 × 10-11 erg cm-2 ct-1
Counts to flux (unabs)8.3 × 10-10 erg cm-2 ct-1
C-stat (dof)15.43 (12)
Exposure time7.5 ks

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